JFD KI40018AA, Operation And Maintenance Manual, Page: 38 / 110

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Chapter 5
KI-OM-6768 R0
Water In the
Crankcase May be caused by humid air
condensing into water inside the
crankcase. Change oil at 3 month or 500 hour
intervals using Divex part no.
DO03764
Leakage of packing seals. Over-
pressure or faulty pressure regulator Replace packing. Check pressure
regulator.
Oil Leaking form
Underside of
Crankcase Worn crankcase seals. Replace seals.
Oil Leaking at the Rear
Portion of the
Crankcase Damaged or improperly installed oil
gauge or crankcase rear cover o-ring,
and drain plug o-ring. Replace oil gauge or cover o-ring and
drain plug o-ring.
Oil Leaking form Drain
Plug Loose drain plug or worn drain plug o-
ring. Tighten drain plug or replace o-ring
Loud Knocking Noise
in Pump Pulley loose on crankshaft. Check key and tighten set screw.
Broken or worn bearing. Replace bearings.
Frequent of Premature
Failure of the Inlet
Manifold Seals Scored plungers. Replace plungers.
Over pressure to inlet manifold. Reduce inlet pressure (2.5 bar).
Damaged or worn plungers. Replace plungers.
Abrasive material in the fluid being
pumped. Install proper filtration on pump inlet
plumbing.
Excessive pressure and/or
temperature of fluid being pumped. Check pressures and fluid inlet
temperature; be sure they are within
specified range.
Over pressure of pumps. Reduce supply pressure.
Running pump dry. Do not run pump without water.
Strong Surging at Inlet
and Low Pressure on
Discharge Side Foreign particles in the inlet or
discharge valve or worn inlet and/or
discharge valves. Check for smooth lap surfaces on inlet
and discharge valve seals. Discharge
valve seals and inlet valve seals may
be lapped on a very fine oil stone.
Low Input Pressure Leaking Relief Valve. Check relief valve function, repair or
replace.
Water inlet to system low or turned off. Turn inlet water on. Check water
supply and hose sizing.
Insufficient flow in water feed lines to
system. Check inlet hose diameter is sufficient
and is not restricted or crushed.
Low pressure in umbilical line or
system. This is expected. As the system’s
output depends upon the flow
resistance, if there is low resistance
the pressure will be low but the flow
rate will be maintained.
Problem Possible Cause Solution